Di- and Mononuclear Iron Complexes of N,C,S-Tridentate Ligands Containing an Aminopyridyl Group: Effect of the Pendant Amine Site on Catalytic Properties for Proton Reduction
作者： Toyotaka Nakae , Masakazu Hirotsu , Isamu Kinoshita
DOI: 10.1021/ACS.ORGANOMET.5B00366
关键词: Ring (chemistry) 、 Redox 、 Medicinal chemistry 、 Overpotential 、 Deprotonation 、 Acetic acid 、 Amine gas treating 、 Chemistry 、 Stereochemistry 、 Pyridine 、 Catalysis
摘要: A series of diiron complexes N,C,S-tridentate ligands containing a 6-, 5-, or 4-amino-2-pyridyl group, [{Fe(μ-L-κ3N,C,S)(CO)2}Fe(CO)3] (2, L = o-apyBPT; 3, m-apyBPT; 4, p-apyBPT), was synthesized: apyBPT is doubly deprotonated form 3′-(amino-2″-pyridyl)-1,1′-biphenyl-2-thiol. Complexes 2–4 were converted to the mononuclear iron(II) trans-[Fe(L-κ3N,C,S)(CO)(PMe2Ph)2] (6, 7, 8, p-apyBPT). In 2 and 6, o-amino group close Fe bound aminopyridyl group. Cyclic voltammograms exhibit two consecutive one-electron reduction events, catalytic current for proton appears in presence acetic acid. The potentials are similar each other, while overpotential with complex ca. 0.2 V lower than those 3 4. 6–8, redox FeIII/FeII couple dependent on position amino pyridine ring, which...
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